On-going project for a new teaching building to provide a base for horticultural therapy activities for an Autism charity. The main workroom is surrounded by support accommodation including a communal kitchen and covered external work area. Each space in the building has a carefully define range of uses with direct links to the external areas around the building where plant growing and tending activities take place. The client's brief was developed in close conjunction with the horticultural therapist and a 'design for autism' specialist who has been working with the Helen Hamlyn Foundation. The timber building consists of a series of stepped blocks with canted roofs which float over the contours of the hillside site.